Use of Principal Component Analysis to Combine Genetic Merit for Heat Stress and for Fat and Protein Yield in Spanish Autochthonous Dairy Goat Breeds

• Published in: Animals (Basel) Vol. 11; no. 3; p. 736
• Main Authors: Menéndez-Buxadera, Alberto, Muñoz-Mejías, Eva, Sánchez, Manuel, Serradilla, Juan Manuel, Molina, Antonio
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 08.03.2021; MDPI
• Subjects: Animals; antagonism; cold zones; dairy goat; dairy goats; Florida; genetic merit; genetic variation; genotype-environment interaction; Goats; Heat; heat stress; heritability; Humidity; lactation; milk; Milk production; Murcia-Granada; principal component analysis; Principal components analysis; Proteins; random regression model; relative humidity; temperature; Variables; variance; Florida; United States > US; Spain; heat stress; dairy goat; random regression model

We studied the effect of the Temperature Humidity Index (THI) (i.e., the average of temperature and relative humidity registered at meteorological stations) closest to the farms taken during the test day (TD), for total daily protein and fat yields (fpy) of the three main Spanish dairy goats. The da...